package cn.edu.abtu.config.security.handler;

import cn.edu.abtu.entity.SysUser;
import cn.edu.abtu.utils.AjaxResult;
import cn.edu.abtu.utils.HttpStatus;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

/*
 * 认证用户访问无权限资源时的处理器
 * */
@Component
public class CustomerAccessDeniedHandler implements AccessDeniedHandler {

    @Override
    public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException accessDeniedException) throws IOException, ServletException {
        // 设置响应的编码格式
        response.setContentType("application/json;charset=utf-8");
        // 获取输出流
        ServletOutputStream outputStream = response.getOutputStream();


        // 将对象转换为JSON格式,并消除循环引用  (HttpStatus.UNAUTHORIZED表示未授权)
        String result = JSON.toJSONString(AjaxResult.error(HttpStatus.UNAUTHORIZED, "无权限访问,请联系管理员"), SerializerFeature.DisableCircularReferenceDetect);

        outputStream.write(result.getBytes(StandardCharsets.UTF_8));
        outputStream.flush();
        outputStream.close();
    }
}
